EP2680999A1

EP2680999A1 - Method for producing at least one cutting line segment of a cutting line

Info

Publication number: EP2680999A1
Application number: EP12716217.0A
Authority: EP
Inventors: Rudolf Fuchs; Milan Bozic; Ivo Eye GRUBER; Joe Lauber; Arnold Hug; Urs Karlen
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2011-03-03
Filing date: 2012-03-02
Publication date: 2014-01-08
Also published as: CN103442834A; DE102011005034A1; US20140123827A1; WO2012116828A1; RU2013144241A; RU2610993C2; CN103442834B

Abstract

The invention relates to a method for producing at least one cutting line segment (10, 12) of a cutting line (14), comprising at least one cutter support element (16, 18) and one cutter element (20, 22), wherein in a first step at least one powder (24) is mixed with at least one binder (26) in a mixing device (28) to produce a feedstock (30).

Description

description

Method for producing at least one cutting strand segment of a

cutting strand

State of the art

Methods for producing a cutting strand segment of a cutting strand are already known. The cutting strand segment in this case comprises a separator carrier element and a cutting element.

Disclosure of the invention

A method is proposed for producing at least one cutting strand segment of a cutting strand comprising at least one separator support element and a cutting element, wherein in a first step a powder is mixed with a binder in a mixing device to form a feedstock. A "cutting-strand segment" is to be understood here as meaning, in particular, a segment of a cutting strand which is intended to be connected to further segments of the cutting strand to form the cutting strand A "cutting strand" is to be understood here as meaning, in particular, a unit of cutting strand segments which is intended to locally cancel an atomic cohesion of a workpiece to be machined, in particular by means of a mechanical severing and / or by means of a mechanical cutting Abtragens material particles of the workpiece. Preferably, the cutting strand is provided to the workpiece in at least

CONFIRMATION COPY Separate two physically separate parts and / or at least partially separate material particles of the workpiece, starting from a surface of the workpiece and / or remove. The cutting strand is particularly preferably designed as a cutting chain. The cutting strand segments of the cutting strand are thus preferably designed as chain links. In this case, the cutting strand segments can be releasably connected, for example by means of a chain lock, etc., and / or inextricably linked to one another. However, it is also conceivable that the cutting strand is designed as a cutting band and / or cutting rope. In an embodiment of the cutting strand as a cutting band and / or as a cutting rope, the cutting strand segments are directly on the

Cutting tape and / or fixed to the cutting rope. The cutting-strand segments may in this case be spaced apart from one another and / or arranged in direct contact with one another on the cutting band and / or on the cutting rope. A "cutter carrier element" is to be understood here as meaning, in particular, an element to which at least one cutting element is fixed for separating and / or removing material particles of a workpiece to be machined. direction "should in particular define a device, in particular a machine, which is intended to mix materials, in particular powdery materials, together and / or to compact the materials. The materials, in particular the at least one powder and the at least one binder, are preferably mixed and / or compressed by means of the mixing device by a stirring movement to form a feedstock. However, it is also conceivable that the materials are mixed with one another by means of another movement and / or by means of another method which appears to be appropriate to a person skilled in the art to form a feedstock. The at least one powder can in this case only consist of a base material, such as iron, for example, or it can consist of several alloying elements. Particularly preferably, the powder is sinterable. The at least one binder is preferably formed from a polymeric binder, such as a wax and / or a plastic, in particular a thermoplastic. However, it is also conceivable that for mixing into a feedstock several binders are mixed with the powder and / or a powder mixture. Under a "feedstock" is here in particular a Starting material, in particular a homogeneous granules, be understood, which is a machine, in particular an injection molding machine, fed and processed by the machine in at least one or more steps. Thus, the feedstock is preferably formed as a homogeneous granules. By means of the embodiment of the method according to the invention can advantageously be produced inexpensively a cutting strand segment. Furthermore, by means of the method, a high diversity with regard to the materials to be processed for producing the cutting-strand segment can be achieved. Furthermore, it is proposed that a metal powder be used as the powder. Preferably, a hard metal powder is used. The cemented carbide powder preferably consists of tungsten carbide as hard material or base powder and cobalt as binder phase and / or of titanium carbide and titanium nitride as hard materials and nickel, cobalt and molybdenum as binder phase. However, it is also conceivable that the metal powder consists of another, a skilled person appear appropriate composition. Preferably, the method is designed as a metal injection molding (MIM) method. It can be advantageously achieved a high hardness, high wear resistance and especially a high thermal hardness of the cutting strand segment.

In an alternative embodiment of the method is proposed that a ceramic powder is used as a powder! Preferably, the method is designed as a Ceramic Injection Molding (CIM) method. The ceramic powder preferably consists of oxide, silicate, nitride ceramics and / or translucent ceramic. However, it is also conceivable that a carbide powder is used as the powder. It can be advantageously achieved a resistant cutting strand segment, which is suitable for high cutting speeds.

Advantageously, in a further step, the feedstock is brought into a shape of the cutting strand segment by means of an injection process, wherein the

Cutting carrier element and the cutting element are integrally formed with each other. A "shape" is to be understood here as meaning, in particular, a geometric shape of the cutting strand segment which fulfills the cutting strand segment in order to fulfill at least one function the cutting element preferably integrally connected to each other. Preferably, a green part of the cutting strand segment is produced by the injection process. Preferably, thermoplastic injection molding machines are used for the injection molding process. It can be advantageously produced a cutting strand segment having a complex component structure. Furthermore, advantageously, a cutting strand segment can be produced inexpensively.

It is also proposed that in a further step, the sprayed

Cutting strand segment is chemically entbindert. Preferably, the at least one binder is dissolved from the green part by means of the chemical debindering. This results in a brown part, especially when using metal powder before the injection process, or a white part, especially when using ceramic powder before the injection process, the cutting strand segment. In an alternative embodiment, it is proposed that in a further step, the cutting strand segment is thermally debinded. Preferably, the at least one binder is released from the green part by means of thermal debinding. However, it is also conceivable that the green part of the cutting strand segment is debinded by means of another method that appears appropriate to a person skilled in the art. Furthermore, it is also conceivable that a thermal debinding and subsequent additional chemical debindering takes place. It may be advantageous to detach the at least one binder for further processing from the green part of the cutting strand segment.

Preferably, in a further step, the cutting strand segment, in particular the Bräunling of the cutting strand segment, sintered. In particular, the sintered cutting strand segment has a total volume of less than 10 mm ³ , preferably less than 9 mm ³ and particularly preferably less than 5 mm ³ . Further processing of the sintered cutting strand segment can advantageously take place directly on the sintering process. By means of the method according to the invention, a cutting strand segment having a complex component structure can advantageously be produced cost-effectively, which has high hardness, high wear resistance and, in particular, high hot hardness.

Furthermore, it is proposed that in a further step, the cutting strand segment is fed to a finishing device. Under a "United "delungsvorrichtung" is here to be understood in particular a device which is intended to change at least one property of an element or a portion of the element, in particular by means of a coating, by means of curing, etc. Preferably, the finishing device comprises a dip bath unit or a application unit However, it is also conceivable for the finishing device to comprise, alternatively or additionally, a hardening unit., By means of the finishing device, preferably a refining by means of an immersion bath or by means of application can be achieved.

Preferably, in a further step in the refining device, a coating is applied to the cutting strand segment at least in a partial region of the cutting strand segment. The coating is preferably formed by a solder. In this case, the coating is in particular by means of a

Dipping bath or applied by means of an order on the cutting strand segment. The partial region of the cutting strand segment is preferably formed by the cutting element of the cutting strand segment. It can be advantageous to adapt a property of the subsection of the cutting strand segment to various application requirements.

In addition, it is proposed that, in a further step in the finishing device, the partial region of the cutting strand segment provided with the coating be filled with particles. Preferably, the particles are formed as hard metallic, as diamantener and / or as a ceramic material. However, it is also conceivable that the particles are formed from another material that appears appropriate to a person skilled in the art. It can be advantageously achieved a hard and resistant portion of the cutting strand segment. In particular, in one embodiment of the portion as a cutting element can be advantageously realized by means of a particle assembly a hard, undefined cutting edge of the cutting element.

Furthermore, the invention is based on a power-tool parting device with at least one guide unit and with at least one cutting strand which has at least one cutting-strand segment produced by means of the method according to the invention. The management unit is preferred for the tion of the cutting strand provided. A "guide unit" is to be understood here in particular as a unit which is intended to exert a constraining force on the cutting strand at least along a direction perpendicular to a cutting direction of the cutting strand in order to predetermine a possibility of movement of the cutting strand along the cutting direction.

In this context, the term "provided" should be understood to mean in particular specially designed and / or specially equipped.The guide unit preferably has at least one guide element, in particular a guide groove through which the cutting strand is guided an entire circumference of the guide unit by the guide unit by means of the guide element, in particular the guide groove out.

In this case, the term "cutting plane" should in particular define a plane in which the cutting strand is moved in at least one operating state along a circumference of the guide unit in at least two mutually oppositely directed cutting directions relative to the guide unit Aligned "at least substantially transversely" here in particular an orientation of a

Level and / or a direction relative to another level and / or another direction are understood, which preferably differs from a parallel orientation of the plane and / or the direction relative to the further plane and / or the other direction. However, it is also conceivable that the cutting plane is aligned at a machining of a workpiece at least substantially parallel to a machined workpiece surface, in particular in an embodiment of the cutting strand as abrasive, etc. By "at least substantially parallel" should in particular an orientation of a direction relative to a reference direction, in particular in a plane, whereby the direction relative to the reference direction has a deviation, in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 ° a direction along which the cutting strand for generating a cutting gap and / or for the separation and / or removal of material particles of a workpiece to be machined in at least one operating state as a result of a driving force and / or a drive torque, in particular especially in the guide unit, is moved. Preferably, the cutting strand is moved in an operating state along the cutting direction relative to the guide unit. In particular, the term "closed system" is intended to define a system comprising at least two components that retain functionality and / or disassemble functionality by interacting in a disassembled state of the system from a higher-level system such as a machine tool Preferably, the at least two components of the closed system are connected to each other at least substantially inseparably. "At least substantially insoluble" is to be understood here as meaning in particular a connection of at least two components which are only under the With the aid of separation tools, such as a saw, in particular a mechanical saw, etc., and / or chemical release agents, such as solvents, etc., are separable from each other. The term "sword" should in particular define a geometric shape which, viewed in the cutting plane, has a self-contained outer contour, the at least two mutually parallel straight lines and at least two respectively facing ends of the straight lines interconnecting connecting sections, in particular Thus, the guide unit has a geometric shape which, viewed in the cutting plane, is composed of a rectangle and at least two circular sectors arranged on opposite sides of the rectangle Versatile tool for machining workpieces can be achieved.

Advantageously, the power-tool parting device comprises at least one torque-transmitting element, which is mounted at least partially in the guide unit. Preferably, the torque transmission element has a concentric recess into which a pinion of a drive unit of a portable power tool and / or a gear and / or a toothed shaft of a gear unit of the portable power tool can engage in an assembled state. In this case, the recess is preferably formed by an inner hexagon. However, it is also conceivable for the recess to have a dere, has a professional appear appropriate design. By means of the embodiment according to the invention of the machine tool separating device, a closed system can be achieved structurally simple, which can be comfortably mounted by an operator on a machine tool provided for this purpose. Thus, it can be advantageously avoided for a single assembly of components, such as the cutting strand, the guide unit and the torque transmitting element, by the operator for use of the power tool separating device according to the invention.

Furthermore, it is proposed that the cutting strand segment at least in a region of a cutting element of the cutting strand segment

is formed particulate. In this case, a cutting tip of the cutting element is preferably particle-filled. However, it is also conceivable that the entire cutting element is particulate matter. It can be advantageously adapted to a property of the cutting element of the cutting strand segment to different application requirements.

Advantageously, the cutting element is formed with particles of diamond and / or with a ceramic material. However, it is also conceivable that the cutting element is alternatively or additionally particle-filled with a hard-metallic material or with another material that appears appropriate to a person skilled in the art. Thus can advantageously by means of a

Particle placement a hard, undefined cutting edge of the cutting element can be realized.

In addition, the invention is based on a portable machine tool having at least one coupling device which can be positively and / or non-positively coupled to a machine tool separating device according to the invention. A "portable power tool" is to be understood here in particular as meaning a power tool, in particular a hand tool, which can be transported by an operator so that it can not be transported by a machine The portable power tool in particular has a mass which is less than 40 kg, preferably less than 10 kg and Particularly preferably less than 5 kg, it can be advantageously achieved a portable machine tool, which is particularly advantageous for a wide range of applications. The machine tool separating device according to the invention and / or the portable power tool according to the invention should not be limited to the application and embodiment described above. In particular, the machine tool separating device according to the invention and / or the portable power tool according to the invention may have a number deviating from a number of individual elements, components and units specified herein for fulfilling a mode of operation described herein.

drawing

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

1 is a diagram of a sequence of a method according to the invention for producing at least one cutting strand segment of a cutting strand in a schematic representation,

2 shows a portable machine tool according to the invention with a machine tool separating device according to the invention in a schematic illustration,

3 is a detailed view of the machine tool separating device according to the invention in a schematic representation,

4 shows a sectional view of a guide unit of the power-tool parting device according to the invention in a schematic representation,

5 shows a sectional view along the line VV from FIG. 3 of the power-tool parting device according to the invention in a schematic illustration, 6 shows a detailed view of mutually coupled cutting-strand segments of the cutting strand in a schematic representation,

7 is a further detailed view of a cutting strand segment of the

Cutting strand in a schematic representation,

Fig. 8 is a detail view of an arrangement of

Cutting carrier elements in a guide unit of the machine tool separating device according to the invention in a schematic representation,

9 shows a detailed view of a cutting strand segment of a cutting strand of an alternative machine tool separating device according to the invention in a schematic illustration,

Fig. 0 is a detail view of an alternative cutting strand segment of

11 shows a detailed view of a cutting strand segment of a cutting strand of a further, alternative, machine tool separating device according to the invention in a schematic illustration, FIG.

12 is a detail view of an alternative cutting strand segment of the

Cutting strand of Figure 11 in a schematic representation,

13 shows a detailed view of a cutting strand segment of a cutting strand of a further, alternative machine tool separating device according to the invention in a schematic illustration and

14 is a detail view of an alternative cutting strand segment of the

Cutting strand of Figure 13 in a schematic representation.

Description of the embodiments

FIG. 1 shows a schematic sequence of a method for producing cutting-strand segments 10, 12 of a cutting strand 14, which each comprise a cutting-carrier element 16, 18 and a cutting element 20, 22 (provided with letters a in FIGS. 6 and 7). The cutting strand segments 10, 12 are made of hard metal or ceramic. Thus, depending on the selected a material powder 24 for producing the cutting strand segments 10, 12 premixed. When producing the cutting-strand segments 10, 12 made of hard metal, the powder 24 has a base powder 42 made of metallic components and alloying elements 44. In this case, the base powder 42 forms a constituent of more than 80% of the powder 24. When manufacturing the cutting strand segments 10, 12 made of ceramic, the powder 24 has a base powder 42 'of ceramic components and alloying elements 44'. The base powder 42 'also forms a constituent of more than 80% of the powder 24. The constituents of the powder 24 are mixed together in advance with a submerged device 46 designed as a mixer. Thus, when producing the cutting-strand segments 10, 12 made of hard metal as the powder 24, a metal powder is used. When producing the cutting strand segments 10, 12 made of ceramic, a ceramic powder is used as the powder 24. In a first step of the method for producing cutting-strand segments 10, 12 of a cutting strand 14, the powder 24 is mixed with binding agents 26, such as plastics, waxes and / or additives, in a mixing device 28 designed as a kneader to form homogeneous, granular granules. the so-called feedstock 30, mixed. The powder 24 and the binders 26 are in this case kneaded by means of the mixing device 28 with a supply of heat to a viscous mass, then cooled and processed into a homogeneous, granular granules, the so-called feedstock 30.

In a further step of the method, the feedstock 30 is brought into a form of the cutting strand segments 10, 12 by means of an injection molding process in an injection molding machine 48, wherein the cutting carrier element 16, 18 and the cutting element 20, 22 are formed integrally with each other. Here, the feedstock 30 after a dosage in an injection unit (not shown here) of the injection molding machine 48 is melted and compacted by means of a screw conveyor (not shown here). The feedstock 30 is pressed by means of the screw conveyor under high pressure by means of a distribution system of the injection molding machine 48 in injection molds (not shown here). The injection molding tools have, except for additionally calculated shrinkage dimensions at least substantially with geometric shapes of the finished manufactured cutting strand segments 10, 12 identical negative shapes of the geometric shapes of the cutting strand segments 10, 12. After the Feedstock 30 was pressed into the injection molds, the injection molds are cooled. This results in the so-called green parts 50 of the cutting strand segments 10, 12. As soon as the injection molds on a

Demolding temperature are cooled, the injection molds are opened in a parting plane and the green parts 50 of the cutting strand segments 10, 12 are pushed out by ejector (not shown here) of the injection molding machine 48 from the negative molds of the injection molds.

In a further step of the method, the sprayed green parts 50 of the cutting strand segments 10, 12 are chemically debinded by means of a debindering device 150. In this case, the binders 26 are chemically dissolved out of the green parts 50. However, it is also conceivable for the sprayed green parts 50 of the cutting strand segments 10, 12 to be thermally debinded by means of the debindering device 150 in order to thermally dissolve the binders. By means of debindering, the so-called brown parts 52 of the cutting-strand segments 10, 12 are formed. The brown parts 52 have an open-pored structure. In a further step of the method, the brown parts 52 of the cutting-strand segments 10, 12 are sintered by means of a sintering device 54. The brown parts 52 of the cutting-strand segments 10, 12 can additionally be thermally debinded prior to a sintering process by means of the sintering device 54. The cutting strand segments 10, 12 are formed by the method entirely of hard metal or entirely of ceramic. Thus, the cutter support members 16, 18 and the cutting elements 20, 22, which are integral with the

Cutting support elements 16, 18 are formed, also made entirely of hard metal or completely made of ceramic. The cutting strand segments

10, 12 are formed after the sintering process as finished parts and can be connected together to form the cutting strand 14.

In order to adapt to different working requirements of the cutting strand 14, the cutting strand segments 10, 12 can be further processed or finished by means of the method. In this case, the cutting-strand segments 10, 12 are fed to a finishing device 56 in a further step after the sintering process in order to finish the cutting-strand segments 10, 12. In the finishing device 56, a coating is applied to the cutting-strand segments 10, 12 at least in a partial region of the cutting-edge segments 10, 12. is brought. The portion of the cutting strand segments 10, 12 is formed by the cutting elements 20, 22. Here, the cutting strand segments 10, 12 with the cutting elements 20, 22 by a Tauchbadeinheit (not shown here) of the finishing device 56 out. In the immersion bath unit, the cutting elements 20, 22 are at least partially coated with a solder. However, it is also conceivable for the cutting elements 20, 22 to be coated with a solder by means of an application unit of the finishing device 56. In a further step, in the finishing device 56, a loading of the partial regions of the cutting-strand segments 10, 12 provided with the coating takes place with particles. Here, the particles are either by means of a

Passing through a further immersion bath or by means of a pressing on the provided with the coating portions of the cutting strand segments 10, 12 equipped with particles. The particles are in the form of diamond, hard metal or ceramic particles. However, it is also conceivable that the cutting strand segments 10, 12 are coated at least in a partial area as an alternative to the immersion bath by means of a chemical vapor deposition unit (not shown here in detail) of the finishing device 56. Other methods of coating the cutting elements 20, 22 of the cutting strand segment 10, 12 that appear appropriate to a person skilled in the art are also conceivable, for example by means of a physical vapor deposition (PVD) process or by means of a plasma enhanced chemical vapor deposition process (PACVD process), etc After the sintering process and after a refining process, the cutting-strand segments 10, 12 are designed as finished parts, which are connected to one another in a further working process for forming the cutting strand 14.

FIGS. 2 to 14 show various embodiments of cutting strand segments which are produced by means of the method described above. In this case, the letters a to d are added to the reference symbols of the exemplary embodiments in order to distinguish the exemplary embodiments. The following description of the embodiments is essentially limited to the differences in the geometric configuration of the cutting strand segments of the embodiments produced by means of the method. FIG. 2 shows a portable machine tool 38a with a machine tool separating device 32a, which together form a machine tool system. The power-tool parting device 32a comprises a cutting strand 14a and a guide unit 34a for guiding the cutting strand 14a. The portable power tool 38a has a coupling device 40a for the positive and / or non-positive coupling with the power tool separating device 32a. In this case, the coupling device 40a can be designed as a bayonet closure and / or as another coupling device that appears meaningful to a person skilled in the art. Further, the portable power tool 38a has a power tool housing 58a enclosing a drive unit 60a and a gear unit 62a of the portable power tool 38a. The drive unit 60a and the gear unit 62a are operatively connected to one another in a manner already known to a person skilled in the art in order to generate a drive torque which can be transmitted to the power-tool parting device 32a. The gear unit 62a is designed as an angle gear. The drive unit 60a is designed as an electric motor unit. However, it is also conceivable for the drive unit 60a and / or the gear unit 62a to have another configuration which appears appropriate to a person skilled in the art. The drive unit 60a is provided to drive the cutting strand 14a of the power-tool parting device 32a in at least one operating state with a cutting speed of less than 6 m / s. In this case, the portable power tool 38a has at least one operating mode in which a drive of the cutting strand 14a in the guide unit 34a of the machine tool separating device 32a along a cutting direction 64a of the cutting strand 14a with a cutting speed of less than 6 m / s is made possible.

FIG. 3 shows the power-tool parting device 32a in a state decoupled from the coupling device 40a of the portable power tool 38a. The machine tool separating device 32a has the cutting strand 14a and the guide unit 34a, which together form a closed system. The guide unit 34a is designed as a sword. Furthermore, the guide unit 34a, viewed in the cutting plane of the cutting strand 14a, has at least two convexly shaped ends 66a, 68a. The convex ends 66a, 68a of the guide unit 34a are on two opposite Sides of the guide unit 34a arranged. The cutting strand 14a is guided by means of the guide unit 34a. For this purpose, the guide unit 34a has at least one guide element 70a (FIG. 8) by means of which the cutting strand 14a is guided. The guide element 70a is designed as a guide groove 72a (FIG. 8) which extends in the cutting plane of the cutting strand 14a along an entire circumference of the guide unit 34a. In this case, the cutting strand 14a is guided by means of the guide groove 72a delimiting edge regions of the guide unit 34a. However, it is also conceivable for the guide element 70a to be formed in another manner that appears appropriate to a person skilled in the art, such as, for example, as rib-like molding on the guide unit 34a, which engages in a recess on the cutting strand 14a. The cutting strand 14a, viewed in a plane perpendicular to the cutting plane, is surrounded on three sides by the guide unit 34a (FIG. 8). The cutting strand 14a is circumferentially moved during operation along the circumference in the guide groove 72a relative to the guide unit 34a.

FIG. 4 shows a sectional view of the guide unit 34a in an unassembled state. The guide unit 34a includes a guide unit main member 74a having two guide surfaces 76a, 78a having mutually different orientations and provided in a mounted state of the guide unit 34a for guiding the cutting strand 14a disposed in the guide unit 34a. The guide surfaces 76a, 78a are formed adjacent to each other. Here, the guide surfaces 76a, 78a at least substantially perpendicular to each other. One of the guide surfaces 76a, 78a extends at least substantially parallel to an outer surface 80a of an outer wall 82a of the guide unit main element 74a. The guide surface 76a extending parallel to the outer surface 80a of the outer wall 82a is composed of two rectangular surfaces and two semicircular annular surfaces which are arranged adjacent to each other along a circumference of the guide unit main element 74a and have a closed course. Thus, the guide surface 76a extending parallel to the outer surface 80a of the outer wall 82a extends along the entire circumference of the guide unit main member 74a, viewed along a circumferential direction in a mounted state in a cutting plane of the cutting strand 14a. Furthermore, one of the guide surfaces 76a, 78a extends at least substantially vertically. right to the outer surface 80a of the outer wall 82a. The guide surface 78a extending perpendicular to the outer surface 80a of the outer wall 82a extends along the entire circumference of the guide unit main member 74a. In addition, the guide unit 34a has a further guide unit main element 84a which has two further guide surfaces 86a, 88a which have mutually different orientations and which are provided in an assembled state of the guide unit 34a for guiding the cutting strand 14a arranged in the guide unit 34a. The further guide surfaces 86a, 88a point to a further guide unit main element 84a

Arrangement of the guide surfaces 76a, 78a on the guide unit main element 74a analog arrangement. Furthermore, the further guide surfaces 86a, 88a of the further guide unit main element 84a have an embodiment analogous to the guide surfaces 76a, 78a of the guide unit main element 74a. The guide unit main element 74a and the further guide unit main element 84a are detachably connected to each other in a mounted state in the cutting plane of the cutting strand 14a by means of a positive and / or non-positive connection. Here, the guide unit main member 74a and the further guide unit main member 84a in an assembled state constitute the guide member 70a of the guide unit

34a for guiding the cutting strand 14a. The guide unit main member 74a and the further guide unit main member 84a are each T-shaped. However, it is also conceivable that the guide unit 34a in an alternative embodiment, not shown here, comprises two lateral guide walls and a guide means element fixedly connected to the two lateral guide walls. Here, the two lateral guide walls each form an at least substantially parallel to an outer surface of one of the lateral guide walls extending guide surface of the guide unit 34a. In the alternative embodiment of the guide unit 34a, which is not shown here, the guide means element forms an at least substantially perpendicular to the outer surface of one of the lateral guide walls extending guide surface. Furthermore, the guide unit 34a has four segment guide elements 90a, 92a, 94a, 96a for guiding the cutting strand 14a, two of the four segment guide elements 90a, 92a, 94a, 96a being provided for movement of the cutting strand 14a in one of the guide unit 34a facing away, along each one at least substantially parallel to the cutting plane of the cutting strand 14a extending direction to limit (Figure 8). The directions along each of the two of the four segment guide elements 90a, 92a, 94a, 96a limit a movement of the cutting strand 14a in a direction away from the guide unit 34a, in each case run at least substantially perpendicular to straight lines of an outer contour of the guide unit 34a. In this case, in each case two of the four segment guide elements 90a, 92a, 94a, 96a are arranged in a region of one of the two straight lines of the outer contour on the guide unit 34a. Thus, two of the four segment guide elements 90a, 92a, 94a, 96a are arranged in a partial region of the guide unit 34a in which the cutting strand 14a is in an operating state during a circumferential movement of the cutting strand 14a in the cutting direction 64a along the circumference of the guide unit 34a Main direction of extension 98a of the portable power tool 38a, is moved in a direction away from the portable power tool 38a direction. Furthermore, two of the four segment guide elements 90a, 92a, 94a,

96a is arranged in a partial region of the guide unit 34a, in which the cutting strand 14a moves in an operating state during a circumferential movement of the cutting strand 14a in the cutting direction 64a along the circumference of the guide unit 34a, viewed along the main extension direction 98a, in a direction facing the portable power tool 38a becomes. The four segment guide elements 90a, 92a, 94a, 96a are provided to hold the cutting strand 14a in regions of the straight lines of the outer contour in the guide groove 72a. The cutting strand 14a includes a plurality of interconnected ones

Cutting strand segments 10a, 12a, the cutter support elements 16a, 18a include. The cutter support elements 16a, 18a are each interconnected by means of at least one connecting element 100a, 102a of the cutting strand 14a, which is at least substantially flush with at least one of two outer surfaces 104a, 106a of the interconnected

Cutting support elements 16a, 18a completes (Figures 6 and 8). The connection The elements 100a, 102a are bolt-shaped. The outer surfaces 104a, 106a extend in a state arranged in the guide groove 72a of the cutting strand 14a at least substantially parallel to the cutting plane. Depending on the application, a person skilled in the art will select a suitable number of cutter carrier elements 16a, 18a for the cutting strand 14a. The

Die carrier elements 16a, 18a are each formed integrally with one of the connecting elements 100a, 102a. Furthermore, the cutter support elements 16a, 18a each have a connecting recess 108a, 110a for receiving one of the connecting elements 100a, 102a of the interconnected cutter support elements 16a, 18a. The connecting elements 100a, 102a are guided by means of the guide unit 34a (FIG. 8). In this case, the connecting elements 100a, 102a are arranged in the guide groove 72a in an assembled state of the cutting strand 14a. The connecting elements 100a, 102a may, viewed in a plane perpendicular to the cutting plane, be supported on the guide surface 76a extending at least substantially parallel to the outer surface 80a and on the further guide surface 86a extending at least substantially parallel to an outer surface 112a of the further guide element main element 84a ,

Furthermore, the cutting strand 14a has a plurality of cutting strand segments 10a, 12a that include cutting elements 20a, 22a. In this case, it is conceivable that some of the cutting-edge segments 10a, 12a are decoupled from cutting elements and instead have reaming elements. A number of the cutting elements 20a, 22a is dependent on a number of cutter support elements 16a, 18a. A person skilled in the art will select a suitable number of cutting elements 20a, 22a, depending on the number of cutter carrier elements 16a, 18. The cutting elements 20a, 22a are each formed integrally with one of the cutter support elements 16a, 18a. Furthermore, the cutting elements 20a, 22a extend in the cutting plane beyond the guide groove 72a, in order to enable a separation and / or removal of material particles of a workpiece to be machined (not shown here). The cutting elements 20a, 22a may be designed, for example, as a full chisel, semi-chisel or other kinds of cutting edge that appear to be suitable for a person skilled in the art, which are intended to enable a separation and / or removal of material particles of a workpiece to be machined. Of the Cutting strand 14a is endless. Thus, the cutting strand 14a is formed as a cutting chain. The cutter support elements 16a, 18a are in this case designed as chain links, which are connected to one another by means of the bolt-shaped connecting elements 100a, 102a.

For the purpose of driving the cutting strand 14a, the power-tool parting device 32a has a torque-transmitting element 36a which can be connected to the drive unit 60a and / or the gear unit 62a in order to transmit forces and / or torques to the cutting strand 14a. For this purpose, the torque transmission element 36a has a coupling recess 14a, in which a pinion (not shown here) of the drive unit 60a and / or a gear (not shown here) and / or a toothed shaft (not shown here) of the gear unit 62a in engages a mounted state. The coupling recess 114a is arranged concentrically in the torque transmission element 36a. Further, the torque transmitting member 36a is formed as a gear. The torque transmitting member 36a is at least partially supported in the guide unit 34a. Here, the torque transmitting member 36a, viewed along a direction perpendicular to the cutting plane, is at least partially between the outer wall 82a of the guide unit main member 74a and an outer wall 116a of the other

Guide unit main element 84a arranged (Figure 5).

The torque transmission element 36a is arranged with a partial region in a recess 118a of the outer wall 82a of the guide unit main element 74a and in a recess 120a of the outer wall 116a of the further guide unit main element 84a. In this case, the torque transmission element 36a has an extension along an axis of rotation 122a of the torque transmission element 36a, at least in the portion arranged in the recesses 18a, 120a, which terminates flush with the outer surface 80a of the guide unit main element 74a and / or the outer surface 112a of the further guide unit main element 84a. Furthermore, the subregion of the torque transmission element 36a arranged in the recesses 118a, 120a has an outer dimension extending at least substantially perpendicular to the rotation axis 122a of the torque transmission element 36a, which dimension is at least 0.1 mm smaller than one at least Substantially perpendicular to the axis of rotation 122a of the torque transmitting member 36a extending inner dimension of the recesses 118a, 120a. The partial region of the torque transmission element 36a arranged in the recesses 118a, 120a is in each case spaced apart along a direction perpendicular to the rotation axis 122a from the edge of the outer wall 82a of the guide unit main element 74a bounding the respective recess 118a, 120a and the outer wall 116a of the further guide unit main element 84a arranged. Thus, the portion of the torque transmitting member 36a disposed in the recesses 118a, 120a has a clearance within the recesses 118a, 120a.

The cutter support elements 16a, 18a of the cutting strand 14a each have a drive recess 124a, 126a, which is in each case arranged in an assembled state on a torque transmitting element 36a facing side 128a, 130a of the respective cutter support member 16a, 18a. The torque transmission element 36a engages in the drive recesses 124a, 126a in at least one operating state for driving the cutting strand 14a. The torque transmitting element 36a comprises teeth 132a, 134a, which are intended to engage in at least one operating state for driving the cutting strand 14a into the drive recess 124a, 126a of the cutter support elements 16a, 18a. Further, the torque transmitting member 36a facing sides 128a, 130a of

Cutting carrier elements 16a, 18a circular arc-shaped. The torque transmitting element 36a facing in an assembled state sides 128a, 130a of the cutter support members 16a, 18a are respectively in portions 136a, 138a, 140a, 142a, between a central axis 144a of the respective connecting element 100a, 102a and a central axis 146a, 148a of the respective connecting recess 108a , 110a viewed, circular arc configured. The arcuate portions 136a, 138a, 140a, 142a are respectively formed adjacent to the drive recesses 124a, 126a engaged by the torque transmitting member 36a. In this case, the circular-arc-shaped partial regions 136a, 138a, 140a, 142a have a radius which corresponds to a radius of a profile of the guide groove 72a at the convex ends 66a, 68a. The partial regions 136a, 138a, 140a, 142a are concave (FIG. 7). In the figures 9 to 14 alternative embodiments are shown. Substantially identical components, features and functions are basically numbered by the same reference numerals. The following description is essentially limited to the differences from the first exemplary embodiment described in FIGS. 2 to 8, wherein reference can be made to the description of the first exemplary embodiment in FIGS. 2 to 8 with regard to components, features and functions remaining the same.

FIG. 9 shows an alternative cutting-edge segment 10b of a cutting strand 14b of a power-tool parting device 32b. The cutting strand segment 10b comprises at least one cutter support element 16b and at least one cutting element 20b. The cutter support member 6b and the cutting member 20b are integrally formed. In this case, the cutting element 20b has a cutting layer 152b having at least titanium carbide. The cutting layer 152b is applied to the cutting element 20b by a CVD method. However, it is also conceivable that the cutting layer 152b alternatively or additionally comprises another material, such as titanium nitride, titanium carbonitride, aluminum oxide, titanium aluminum nitride, chromium nitride or

Zirkoncarbonitrid. In addition, it is also conceivable that the cutting layer 152b is applied by means of another method which appears expedient to a person skilled in the art, for example by means of a PVD or PACVD method.

The blade carrier element 16b has at least one segment counter-guide element 154b, which is intended to prevent movement of the

Cutting carrier element 16b, viewed in a in a guide unit (not shown here) arranged state in a direction away from the guide unit direction, at least along the at least substantially parallel to a cutting plane of the cutting strand 14b extending direction. The segment counter-guide element 154b is formed by a transverse extension, which extends at least substantially perpendicular to the cutting plane of the cutting strand 14b. Here, the segment counter-guide member 154b defines a longitudinal groove. The segment counter-guide element 154b is provided to provide a movement limitation with an inner surface of a guide wall (not shown here in detail) facing the cutter support element 16b and arranged as a rib or punching formed segment guide element (not shown here) cooperate. The segment guide element is formed corresponding to the segment countermember 154b. Overall, the cutting string 14b has a plurality of cutting strand segments 10b, each comprising a cutter support member 16b and a cutting member 20b. each

In this case, cutter carrier element 16b comprises at least one segment counter-guide element 154b, which is intended to prevent movement of the

Cutting carrier elements 16b, seen in a arranged in the guide unit state in a direction away from the guide unit direction, at least along at least substantially parallel to the cutting plane of the

Cutting strand 14b extending direction to limit.

In addition, each of the cutter support elements 16b has a compressive force transfer surface 156b (FIGS. 7 and 8). The compressive force transfer surface 156b is intended to provide compressive forces associated with machining a workpiece

(Not shown here in detail) act on the cutting strand 14b, by means of an interaction with a pressure force receiving area (not shown here) to support the guide unit. The pressure force receiving region of the guide unit is in this case, as viewed along an at least substantially perpendicular to the cutting plane of the cutting strand 14b direction extending between two at least substantially mutually parallel outer surfaces (not shown here in detail) of the guide unit.

The cutter support member 16b further includes a drive surface 158b which is intended to cooperate to drive the cutting string 14b with drive surfaces of a torque transmitting member (not shown in detail here). The drive surfaces of the torque transmission element are in this case formed as tooth flanks. The drive surface 158b of

In this case, cutter carrier element 6b is designed corresponding to the drive surfaces of the torque transmission element. In a drive of the

Schneidstrangs 14b are the tooth flanks of the torque transmitting element temporarily on the drive surface 158b to a transmission of driving forces. The cutter support element 16b comprises at least one connecting element 100b which terminates at least substantially flush with at least one outer surface 104b of the cutter carrier element 16b in order to form the cutting strand 14b. Here, the connecting element 100b, considered along a transverse axis of the connecting element 100b, flush with both outer surfaces

104b of the cutter support member 16b (not shown here). The transverse axis of the connecting element 100b extends at least substantially perpendicular to the cutting plane of the cutting strand 14b. The connecting element 100b is formed integrally with the cutter support element 16b. In this case, the connecting element 100b is a longitudinal extension of the cutter carrier element

16b trained. The connecting element 100b designed as a longitudinal extension extends at least substantially along a longitudinal extent of the cutter carrier element 16b. Thus, the connecting element 100b designed as a longitudinal extension extends at least substantially parallel to the cutting plane of the cutting strand 1b. Here, the longitudinal extension is hook-shaped. In this case, the longitudinal extension is deviating from a rod-shaped extension, to which a circular form-fitting element is formed and / or deviating from a semicircular extension. Each cutter support element 16b of the cutting strand segments 10b of the cutting strand 14b has in each case a connecting element 100b designed as a longitudinal extension and in each case a connecting recess 108b formed correspondingly with the connecting element 100b. The individual connecting elements 100b of the cutter carrier elements 16b are respectively provided for forming the cutting strand 14b designed as a cutting chain to realize a positive connection between the cutter carrier elements 16b by means of cooperation with a connecting recess 108b, by means of which the cutter carrier elements 16b are pivotally connected to one another. Furthermore, the connecting element designed as a longitudinal extension has

100b on one side on a cross-security area 160b. The transverse securing region 160b is provided, by means of an interaction with at least one transverse securing element of a further cutter carrier element (not illustrated in detail here) connected to the cutter carrier element 16b, of the cutting strand segments 10b of the cutting strand 14b, a transverse seal. tion of the cutter support member 16b along at least two oppositely directed directions in a coupled state relative to the further cutter support element at least to prevent as far as possible. Here, the transverse securing portion 160b is formed as a rib. However, it is also conceivable that the transverse securing region 160b has another configuration that appears appropriate to a person skilled in the art, such as a configuration as a groove, etc. The transverse securing region 160b is on a side of the connecting element facing the cutting carrier element 16b in one piece 100b arranged.

Furthermore, the cutter support element 16b has two transverse securing elements 162b, 164b, which are provided to cooperate with the further cutter carrier element in a coupled state of the cutter carrier element 16b with a transverse securing region of the further cutter carrier element. The transverse securing elements 162b, 164b are each in a

Connecting recess 108b limiting edge region of the cutter support member 16b arranged. Here, the transverse securing elements 162b, 164b are formed integrally with the cutter support element 16b. The transverse securing elements 162b, 164b are each integrally formed on the cutter support element 16b by means of an embossing process. Thus, the transverse securing elements 162b, 164b, viewed along a direction extending at least substantially perpendicular to the cutting plane of the cutting strand 14b, extend as far as the outer surfaces 104b of the cutter carrier element 16b. However, it is also conceivable that the transverse securing elements 162b, 164b are formed integrally with the cutter support element 16b by means of another method that appears appropriate to a person skilled in the art, for example by means of a welding method, by means of a gluing method, by means of a stamping method, by means of a bending method, etc. the transverse securing elements 162b, 164b, viewed along a direction extending at least substantially perpendicular to the cutting plane of the cutting strand 14b, are arranged on mutually opposite sides of the cutter carrier element 16b. Furthermore, the transverse securing elements 162b, 164b are arranged offset relative to one another on the cutter carrier element 16b. Thus, the transverse securing elements 162b, 164b, based on the Cutting plane of the cutting strand 14b, arranged differing from a mirror-symmetrical arrangement on the cutter support member 16b. Here, the transverse securing elements 162b, 164b are formed as partial extensions on an edge region of the connecting recess 108b. However, it is also conceivable that the transverse securing elements 162b, 164b another, a

Those skilled in a seem appropriate design and / or arrangement, such as a configuration as a parallel webs, which limit a groove-shaped recess in the edge region of the connecting recess 108b, viewed along a direction at least substantially perpendicular to the cutting plane of the cutting strand 14b direction.

FIG. 10 shows a cutting-strand segment 10b 'designed as an alternative to the cutting-strand segment 10b illustrated in FIG. The cutting strand segment 10b 'is formed at least substantially analogously to the cutting strand segment 10b shown in FIG. In contrast to the cutting strand segment 10b from FIG. 9, the cutting strand segment 10b 'from FIG. 10 has a particle-equipped cutting element 20b'. In this case, the cutting element 20b 'has a coating into which particles are introduced. The particles are in this case formed as diamond particles. However, it is also conceivable that the particles have another, a skilled person appear appropriate design, such as a configuration as a hard metal particles, as ceramic particles, etc.

FIG. 11 shows another alternative cutting-strand segment 10c of a cutting strand 14c of a power-tool parting device 32c. The

Cutter segment 10c includes at least one cutter support element 16c and at least one cutting element 20c. The cutter support member 16c and the cutting member 20c are formed integrally. The cutting element 20c in this case has an at least titanium carbide having cutting layer 152c. In order to form the cutting strand 14c, the cutter support element 16c comprises at least one connecting element 100c, which terminates at least substantially flush with at least one outer surface 104c of the cutter carrier element 16c. The connecting element 100c is formed bolt-shaped. Here, the connecting element 100c extends along an at least substantially perpendicular to a cutting plane of the cutting strand 14c extending Direction. Furthermore, the cutter support element 16c has a connection recess 108c. The connection recess 108c is provided for forming the cutting strand 14c formed as a cutting chain by means of an interaction with a connecting element of another

Cutting carrier element of another cutting strand segment (not shown here) of the cutting strand 1 c to realize a positive connection between the cutter support member 16c and the other cutter support element, by means of which the cutter support member 16c and the other cutter support member are pivotally connected.

Furthermore, the cutter support element 16c has at least one transverse securing element 162c, which is provided to prevent, as far as possible, transverse movement of the cutter carrier element 16c in a coupled state relative to the further cutter carrier element. In addition, the cutter support element 16c has a transverse securing region 160c. The transverse securing element 162c is designed as an extension. Here, the cross-securing element 162c is in a coupling region 166c of the

Cutter support element 16c arranged. Thus, the transverse securing element 162c, together with the coupling region 166c, limits a groove-shaped recess extending at least substantially parallel to the cutting plane of the cutting strand 14c to receive a transverse securing region (not shown here in detail) of the further cutter carrier element in a coupled state. In the coupling region 166c, the connecting element 100c is arranged, which is inserted into a connecting recess of the further cutter support element to a realization of a positive connection during assembly of the cutting strand 14c. The transverse securing element 162c is formed integrally with the cutter carrier element 16c. In this case, the transverse securing element 162c is integrally formed on the cutter carrier element 16c by means of an embossing process.

The lateral securing portion 160c is disposed, viewed along a cutting direction of the cutting string 14c, on a side of the cutter support member 16c facing away from the coupling portion 166c. Here, the transverse securing portion 160c is formed as a rib-shaped longitudinal extension. However, it is also conceivable that the transverse fuse area 160c may be another, a specialized The transverse securing element 162c covers the transverse securing area of the further cutter carrier element in a coupled state in order to at least largely avoid transverse movement of the cutter carrier element 16c relative to the further cutter carrier element along at least two oppositely directed directions. In addition, the cutter support element 16c comprises at least one segment counter-guide element 154c. Further, the cutter support member 16c has a thrust transfer surface 156c

FIG. 12 shows a cutting strand segment 10c 'formed as an alternative to the cutting strand segment 10c shown in FIG. The cutting strand segment 10c 'is formed at least substantially analogously to the cutting strand segment 10c shown in FIG. In contrast to the cutting strand segment 10c from FIG. 11, the cutting strand segment 10c 'from FIG. 12 has a particle-equipped cutting element 20c'. In this case, the cutting element 20c 'has a coating into which particles are introduced. The particles are in this case formed as diamond particles. However, it is also conceivable that the particles have another, a skilled person appear appropriate design, such as a configuration as a hard metal particles, as ceramic particles, etc.

FIG. 13 shows a further, alternative cutting strand segment 10d of a cutting strand 14d of a power-tool parting device 32d. The cutting strand segment 10d comprises at least one cutter support element 16d and at least one cutting element 20d. The cutter support member 16d and the cutting element 20d are formed integrally. In this case, the cutting element 20d has a cutting layer 152d having at least titanium carbide. The cutter support element 16d comprises two connecting recesses 108d, 110d into which a bolt-shaped connecting element (not shown here in detail) of a further cutter carrier element (not shown here in detail) of the cutting strand 14d can be introduced to form the cutting strand 14d. In addition, the cutter support element 16d comprises at least one segment counter-guide element 154d. Further, the cutter support member 16d includes a triangular drive portion 166d. Here it is Segment counter guide element 154d arranged in the drive region 166d. Further, a drive surface 158d of the cutter support member 16d is disposed in the drive portion 166d.

FIG. 14 shows a cutting strand segment 10d 'formed as an alternative to the cutting strand segment 10d shown in FIG. The cutting strand segment 10d 'is formed at least substantially analogously to the cutting strand segment 10d shown in FIG. In contrast to the cutting strand segment 10d from FIG. 13, the cutting strand segment 10d 'from FIG. 14 has a particle-equipped cutting element 20d'. Here, the cutting element 20d 'on a coating in which particles are introduced. The particles are in this case formed as diamond particles. However, it is also conceivable that the particles have another, a skilled person appear appropriate design, such as a configuration as a hard metal particles, as ceramic particles, etc.

Claims

claims

1. A method for producing at least one cutting strand segment (10, 12) of a cutting strand (14) comprising at least one cutting carrier element (16, 18) and a cutting element (20, 22), wherein in a first step at least one powder (24) is mixed with at least one binder (26) in a mixing device (28) to a feedstock (30).

2. The method according to claim 1, characterized in that a metal powder is used as the powder (24).

3. A method at least according to claim 1, characterized in that a ceramic powder is used as the powder (24).

4. The method according to any one of the preceding claims, characterized in that in a further step, the feedstock (30) by means of an injection process in a form of the cutting strand segment (10, 12) is brought, wherein the cutter support member (16, 18) and the cutting element ( 20, 22) are formed integrally with each other.

5. The method according to claim 4, characterized in that in a further step, the sprayed cutting strand segment (10, 12) is chemically entbindert.

6. The method at least according to claim 4, characterized in that in a further step, the cutting strand segment (10, 12) is thermally entbindert.

7. The method according to any one of claims 5 or 6, characterized in that in a further step, the cutting strand segment (10, 12) is sintered.

8. The method according to claim 7, characterized in that in a further step, the cutting strand segment (10, 12) of a finishing device (56) is supplied.

9. The method according to claim 8, characterized in that in a further step in the finishing device (56) at least in a partial region of the cutting strand segment (10, 12) a coating on the cutting strand segment (10, 12) is applied.

10. The method according to claim 9, characterized in that in a further step in the finishing device (56), a loading of the provided with coating portion of the cutting strand segment (10, 12) takes place with particles.

A machine tool separating device having at least one guide unit (34a) and at least one cutting strand (14a; 14b; 14c; 14d), which comprises at least one cutting strand segment (10a, 12a; 10b; 10c; 10d) produced by a method according to one of claims 1 to 10 ) having.

12. Machine tool separating device according to claim 11, characterized by at least one torque transmission element (36a) which is at least partially mounted in the guide unit (34a).

13. A machine tool separating device according to claim 11, characterized in that the cutting strand segment (10b ', 10c', 10d ') is formed at least in one region of a cutting element (20b', 20c ', 20d') of the cutting strand segment (10b ', 10c', 10d ') ') is formed particulate.

14. Machine tool separating device according to claim 13, characterized in that the cutting element (20b ', 20c', 20d ') is formed with diamonds and / or with a ceramic material particulate.

15. Portable machine tool with at least one coupling device (40a), the form-locking and / or non-positively coupled with a Werkzeugmaschi- nentrennvorrichtung according to any one of claims 11 to 14.